This is #6 in the Metagaming Microquests series. Like Treasure of the Silver Dragon, it is a programmed adventure for Melee and Wizard (or the Advanced versions), which also included a real-world treasure hunt. Along with the game booklet, the box contains an 8 x 13 map, a counter sheet (which you must cut apart), and a die.
From the back of the box:
"The $10,000 quest continues....
Etherion, the great silver Dragonodon, is frozen in stasis under Sacremento Peak -- victim of the Toltec Brujos. Yet man's hope lives through Miri the True and Golden Xenon. Can your band of hearty heroes help them before cruel Yaoyotl strikes? Can you find the secret treasure of Unicorn Gold?
A Unicorn is hidden somewhere in the U.S.A. The clues to its location are hidden in this adventure. The person who finds it gets a $10,000 cash prize from Metagaming. This isn't play, it's a real live treasure hunt. You may be the one to decipher the clues, find the Unicorn, and win the treasure."